i'm lynn berry, we begin with a wedding in the works. in less than a year, prince william and his birl friend will have a fairy tale ending. we're starting to learn details of his engagement to kate middleton, including how he made sure his late mother didn't miss out by giving his mother's diamond engagement ring. we go to todd brad by for his interview with the couple. >> it was a total shock. >> reporter: i think kate was nervous, william wasn't particularly. he was laughing and joking. it has to be said, you both look incredibly happy and relaxed. >> we are. we're like ducks, calm on the surface but we've been talking about it for a long time so for us it's a real releaf.